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DERIVATIVES AND HEDGING ACTIVITIES - Classification on Consolidated Statements of Financial Condition (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 USD ($) DerivativeInstrument | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) DerivativeInstrument
Cash Flow Hedges |  |  |
Collateral received against obligations in net asset position |  |  | $ 4,600,000
Not Designated as Hedging Instrument [Member] |  |  |
Cash Flow Hedges |  |  |
Loan level derivative income | $ 6,000 | $ 1,792,000 |
Interest Rate Swaps Related to FHLBNY Advances [Member] | Designated as Hedging Instrument |  |  |
Cash Flow Hedges |  |  |
Count, assets | DerivativeInstrument | 4 |  | 4
Notional amount, assets | $ 150,000,000 |  | $ 150,000,000
Fair value assets | $ 11,240,000 |  | $ 4,358,000
Loan Level Interest Rate Swaps with Borrower (Assets) | Not Designated as Hedging Instrument [Member] |  |  |
Cash Flow Hedges |  |  |
Count, assets | 20 |  | 98
Notional amount, assets | $ 115,621,000 |  | $ 599,003,000
Fair value assets | $ 4,258,000 |  | $ 27,440,000
Loan Level Interest Rate Swaps with Borrower (Liabilities) | Not Designated as Hedging Instrument [Member] |  |  |
Cash Flow Hedges |  |  |
Count, liabilities | 162 |  | 12
Notional amount, liabilities | $ 1,051,421,000 |  | $ 100,774,000
Fair value liabilities | (50,760,000) |  | $ (53,000)
Posted collateral | $ 0 |  |
Loan Level Interest Rate Swaps with Borrower 3 | Not Designated as Hedging Instrument [Member] |  |  |
Cash Flow Hedges |  |  |
Count, assets | 1 |  |
Count, liabilities | DerivativeInstrument |  |  | 87
Notional amount, assets | $ 23,769,000 |  |
Notional amount, liabilities |  |  | $ 612,610,000
Fair value assets | $ 9,000 |  |
Fair value liabilities |  |  | $ (12,620,000)
Loan Level Interest Rate Floors with Borrower | Not Designated as Hedging Instrument [Member] |  |  |
Cash Flow Hedges |  |  |
Count, liabilities | 42 |  | 98
Notional amount, liabilities | $ 334,329,000 |  | $ 599,003,000
Fair value liabilities | $ (5,559,000) |  | $ (27,440,000)
Loan Level Interest Rate Floors with Borrower 2 | Not Designated as Hedging Instrument [Member] |  |  |
Cash Flow Hedges |  |  |
Count, assets | DerivativeInstrument |  |  | 33
Notional amount, assets |  |  | $ 291,990,000
Fair value assets |  |  | $ 615,000
Loan Level Interest Rate Swaps with Third-part Counterparties 2 | Not Designated as Hedging Instrument [Member] |  |  |
Cash Flow Hedges |  |  |
Count, liabilities | 20 |  |
Notional amount, liabilities | $ 115,621,000 |  |
Fair value liabilities | (4,258,000) |  |
Loan Level Interest Rate Swaps with Third-part Counterparties | Designated as Hedging Instrument |  |  |
Cash Flow Hedges |  |  |
Posted collateral | $ 0 | $ 0 |
Loan Level Interest Rate Swaps with Third-part Counterparties | Not Designated as Hedging Instrument [Member] |  |  |
Cash Flow Hedges |  |  |
Count, assets | DerivativeInstrument |  |  | 87
Count, liabilities | 162 |  |
Notional amount, assets | $ 1,051,421,000 |  | $ 612,610,000
Fair value assets | 50,760,000 |  | 12,620,000
Posted collateral | $ 0 |  | $ 14,000,000.0
Loan level interest rate swaps with third party counterparties (Assets) | Not Designated as Hedging Instrument [Member] |  |  |
Cash Flow Hedges |  |  |
Count, assets | 1 |  | 33
Notional amount, liabilities | $ 23,769,000 |  | $ 291,990,000
Fair value liabilities | (9,000) |  | $ (615,000)
Posted collateral | $ 53,200,000 |  |
Loan Level Interest Rate Floors with Third-part Counterparties | Not Designated as Hedging Instrument [Member] |  |  |
Cash Flow Hedges |  |  |
Count, assets | 42 |  | 12
Notional amount, assets | $ 334,329,000 |  | $ 100,774,000
Fair value assets | $ 5,559,000 |  | $ 53,000

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